National Institute of Standards and Technology (NIST)
International Systemn of Units (Si)
The official sources from which NIST forms its decisions for "official usage". Most useful if you're doing serious research about SI.
Sophia Learning
Sophia: The Si System: Lesson 3
This lesson should help the learner understand how to use the SI system to make measurements. It is 3 of 5 in the series titled "The SI System."
Other
Wfp Consulting: Si Navigator
A commercial site which has links to many SI/metrics sites. It gets you to a host of sites. Don't hesitate to use it for research.
Texas Instruments
Texas Instruments: Uncertainty and Significant Figures
This activity assesses students' knowledge and understanding of uncertainty and significant figures.
Texas Education Agency
Texas Gateway: Ap Physics: Introduction to Physics Summary Section
This page offers a summary of each section in Chapter 1: Introduction to Physics of the AP Physics online text. It covers the main concepts such as Physical Quantities and Units and Approximation.
Chiral Publishing
Chiral Publishing: An Introduction to Chemistry: Conversion Factors
Check your knowledge of conversion factors in this interactive practice activity. Practice unit conversions by filling in the number that completes them.
Texas Education Agency
Texas Gateway: What Is Physics?: Section Summary
This is a summary of the most important takeaway ideas from Chapter 1: What is Physics? from the TEA Physics text.
Other
Interactive Learning Paradigms: Volume Unit Conversions
Learn the units of volume measurement. Page includes a conversion calculator, information about the metric system, and numerous links to other relevant material.
Sophia Learning
Sophia: Base & Derived Quantities: Lesson 4
This lesson should help the learner understand the difference between base and derived quantities and be able to recognize them from one another. It is 4 of 4 in the series titled "Base & Derived Quantities."
Sophia Learning
Sophia: Practice Determining Base vs. Derived Quantities: Lesson 4
This lesson should help a learner to practice recognizing base and derived units. It is 4 of 4 in the series titled "Practice Determining Base vs. Derived Quantities."
Sophia Learning
Sophia: Practice Determining Base vs. Derived Quantities: Lesson 1
This lesson should help a learner to practice recognizing base and derived units. It is 1 of 4 in the series titled "Practice Determining Base vs. Derived Quantities."
Math2
Math2.org: Weights and Measures
This resource provides information on weights and measures, including unit conversion tables.
Colorado State University
A Chronology of the Si Metric System
The U.S. Metric Association offers important dates in the history of the metric system of measurement, including the fact that Thomas Jefferson proposed a decimal-based measurement system for the United States in 1790. Site includes...
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Metric System
This lesson plan familiarizes students in grades 4-6 with using the metric system and performing conversions.
ClassFlow
Class Flow: The Metric System
[Free Registration/Login Required] This flipchart is for discussion regarding use of metric system and conversions in chemistry. Includes links to websites for further discussion, to a Power Point Slideshow for teaching conversion, to a...